What is "ESIM" convenient?Major carriers start one after another (real sound) --Yahoo! News

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　The built -in SIM card standard "ESIM", which will be available on KDDI (au) and UQ Mobile the other day, and will also start using NTT DOCOMO and its online plan "AHAMO" from September 8. What are the benefits of the standards that mobile carriers have introduced? [Photo] GALAXY "triple -fold smartphone", which is rumored to be released, and not replaced SIM cards Currently many smartphones and tablets use "SIM cards" to use communication functions. The SIM card of the small IC card that is small enough to get on the fingertips is written in the "SIM card slot" on the side of the device. Many of you may have seen it due to a new smartphone contract or a model change. On the other hand, ESIM (Embedded-SIM: embedded SIM) is a chip built in the device and cannot be seen or removed by users. Then, how to use it is that the user selects his own career from a smartphone setting menu or app, and writes phone numbers and contract information to the chip. It is also true that traditional SIM cards and SIM card slots were restricted in small smartphones. However, with ESIM, the chips can be built -in somewhere on the smartphone, so it is possible to increase the degree of freedom of the body design or have a larger battery. -The contract and career transfer ESIM will demonstrate the original territory at any time when you have a new contract for a mobile carrier. In the conventional contract, it was necessary to go to the shop's store or wait for the SIM card delivery. It may have been good in the style before using mobile carriers for years, but the trouble has become commonplace in recent years. However, in ESIM, if you apply for a contract plan from a mobile carrier website, you can start using it immediately. For identification at the time of the contract, use the "EKYC (online confirmation system)", which shoots the person with a smartphone camera and collects it with the submitted material. As a result, it became possible to immediately contract and use a mobile carrier plan from home. Using ESIM makes it easier to switch plans across mobile carriers. In addition, it can be used to use the main plan as a physical SIM and write a low -cost data communication plan to ESIM. Furthermore, when you visit other countries for overseas travel, you can use a local carrier contract plan without going to a local mobile shop.・ What are the disadvantages of ESIM? ESIM seems to be just a merit like this, but it does not mean that there are no drawbacks at all. First, you need a supporting smartphone to use ESIM. Many smartphones sold in recent years, such as iPhone XS or later, iPhone SE (2nd generation), Pixel 3A or later, and Galaxy S20 or later, are compatible with ESIM, but before use, confirm whether they can respond. You need to keep it. Even if ESIM is introduced, the mechanism of "SIM lock" remains. SIM lock is a system that cannot use other companies' SIM cards for a certain period of smartphones purchased from mobile carriers. However, the Ministry of Internal Affairs and Communications has announced a guideline in August this year, "Prohibition of SIM locks," and this restriction is likely to be alleviated soon. With the three major carriers and their online plans, ESIM should be a much more familiarity for us. Because it is a new mechanism, you may be confused by the initial settings, but please experience the benefits of ESIM that you can contract when you want and switch your career.

Naoki Tsukamoto